I used to take photos of each techs area and post them on the door. This kind of acted as a warning to those about to enter the area that they were about to enter a war zone. This usually solved the problem, the photos were seldom up more than a day before things got cleaned up. I set up cabinets for each catagory, keyboards, MOBO's, hard drives, CD's, software, power supplies ETC. At least that way they could close the doors of the cabinet. This usually happened on a two week basis, but I was happy, as they were seldom around and it at least meant they were out working and not playing games at their desks.